![]() Even under the lightest loads I’m still yet to see it exceed 4.2 GHz, according to iStat Menus (or Intel’s Power Gadget). Still merely aspirational, as far as I can tell. use of AVX512 vs not, or something like that – most Skylake Xeons have significantly lower clock frequencies when the AVX512 unit is in use, though AFAIK the relevant data-sheets aren’t available publicly for the specific SKUs Apple use in the 8- and 10-core iMac Pros, so I can’t be sure). The workload isn’t identical, so perhaps this is a natural result of subtle workload differences (e.g. The inlet temperature to the case is actually lower now, too. For some reason the full-load CPU frequency on my machine has dropped from 3.6 GHz to 3.4 GHz.It oscillates back and forth in frequency at a high enough frequency (0.1-0.2 Hz) – and with significant range – that it’s quite noticeable, audibly, and sometimes distracting. The fan control algorithm is a bit amateur. ![]()
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